One important (and often neglected) parameter in FEM meshes is the aspect ratio. The aspect ratio is the measure of a mesh element's deviation from having all sides of equal length. A high aspect ratio occurs with long, thin elements.
figure: low and high aspect ratio (source Soidworks blogs)
Because having high values of aspect ratio means that the FEA accuracy reduces, therefore most mesh generators try to make -as much as possible- low aspect ratio elements.
The problem occurs with rods and sheets of metal. Both of them have (at least) one dimension that its significantly higher that the other. So for example for a sheet element (like t...
I will finish later